The new MacBook Neo is equipped with two USB-C ports, but they are not the same. The left USB-C port supports USB 3 speeds of ...
As for what happens if you try to connect a display over the USB 2 port, Apple tells John Gruber at Daring Fireball that macOS will warn you that you’re using the wrong USB-C port.
The MacBook Neo's two USB-C ports have two different specifications, with one being limited to USB 2 speeds. One port is a USB-C 3 port with support for data transfer speeds up to 10 Gb/s, while the ...